Good thing you included the macro-expansion. :) I see:
GT.APP.BASE::
...a couple of places. Your error sounds like a package issue. So I think you need to cobble together a fuller code chunk (including all relevant defpackages and maybe adding some in-package forms) and make sure the only errors you get are status and opcode and send that along. (A couple of functions are missing as well.)
If you want to research on your own, just use (apropos "OPCODE") and see how many symbols pop up and to what package they belong, etc etc.